Time and again I’ve seen applications fail because of an unusable interface design. This not only includes the look-and-feel of the application, but the actual interaction processes that it contains. I know many people who immediately leave a Web site if it does not look appealing or function simply from the start. It doesn’t matter whether the application could have helped them accomplish a goal, it simply doesn’t stand a chance without usable design and functionality. Simply put, if an application doesn’t look usable it’s not usable.